Maxim 公司的MAX2991是動力線通信(PLC)模擬前端收發器,具有優異的性能和降低系統成本.MAX2991采用OFDM信號在動力線上進行傳輸,工作頻率10kHz到490kHz,可編程濾波器和 CENELEC, FCC,ARIB標準兼容.單電源3.3V工作,主要用在自動讀表(AMR),家庭自動化,HVAC" title="HVAC">HVAC,建筑物自動化,工廠自動化" title="工廠自動化">工廠自動化,照明控制,傳感器控制和數據采集(SCADA),遙測和遙控.本文介紹了MAX2991主要特性,方框圖,典型應用框圖和MAX2990/MAX2991評估板主要特性以及智能電網解決方案相關框圖.
The MAX2991 power-line communication analog front-end (AFE) is a state-of-the-art integrated circuit that delivers high integration and superb performance, while reducing the total system cost. The MAX2991 is the first AFE specifically designed for OFDM (orthogonal frequency division multiplexing) modulated signal transmission over power lines. Operating in the 10kHz to 490kHz band, the programmable filters allow compliance with CENELEC, FCC, and ARIB standards using the same device.
The MAX2991 transceiver provides two main paths: transmit (Tx) path and receive (Rx) path. The transmit path injects an OFDM modulated signal into the AC or DC line. The transmit path is composed of a digital IIR filter, digital-to-analog converter (DAC), followed by a lowpass filter, and a preline driver. The receiver path is for the signal enhancement, filtering, and digitization of the received signal. The receiver is composed of a lowpass and a highpass filter, a two-stage automatic gain control (AGC), and an analog-to-digital converter (ADC). The integrated AGC maximizes the dynamic range of the signal up to 60dB, while the lowpass filter removes any out-of-band noise, and selects the desired frequency band. The ADC converts the enhanced and amplified input signal to a digital format. An integrated offset cancellation loop minimizes the DC offset.
The MAX2991, along with the MAX2990 PLC baseband modem, delivers the most cost-effective data communication solution over power-line networks in the market. The MAX2991 is specified over the -40NC to +85NC temperature range and is available in a 48-pin LQFP package.
MAX2991主要特性:
Optimized to Operate with the MAX2990 PLC Baseband
Integrated Band Select Filter, AGC, and 10-Bit ADC for Rx Path
Integrated Wave-Shaping Filter, Programmable Predriver Gain, and 10-Bit DAC for Tx Path
Variable Sampling Rate Up to 1.2Msps
Built-In 60dB Dynamic Range AGC and DC Offset Cancellation
Programmable Filters Operate in the CENELEC, FCC, and ARIB Frequency Bands
Single 3.3V Power Supply
70mA Typical Supply Current (Half-Duplex Mode)
Extended Operating Temperature Range
MAX2991應用:
Automatic Meter Reading
Home Automation
Heating Ventilation and Air Conditioning (HVAC)
Building Automation
Industrial Automation
Lighting Control
Sensor Control and Data Acquisition (SCADA)
Remote Monitoring and Control
Security Systems/Keyless Entry
Smart Grid
圖1.MAX2991功能方框圖
圖2.MAX2991典型應用電路框圖
圖3.MAX2990和MAX2991方框圖
MAX2990/MAX2991評估板
The MAX2990 evaluation kit is a highly integrated chipset including the MAX2990 baseband (BB) and MAX2991 analog front end (AFE). This system transfers data over 120V or 240V AC powerlines, DC, or cold wire. The MAX2990 baseband uses an orthogonal frequency division multiplexing modulation (OFDM) technique that can be configured to operate in the 10kHz to 490kHz frequency band.
The MAX2990 evaluation kit contains two modems and the evaluation software. It is assembled and preconfigured to demonstrate performance under a variety of international regulatory requirements.
MAX2990/MAX2991評估板主要特性:
Optimized to Operate with the MAX2990 PLC Baseband
Integrated Band Select Filter, AGC, and 10-Bit ADC for Rx Path
Integrated Wave-Shaping Filter, Programmable Predriver Gain, and 10-Bit DAC for Tx Path
Variable Sampling Rate Up to 1.2Msps
Built-In 60dB Dynamic Range AGC and DC Offset Cancellation
Programmable Filters Operate in the CENELEC, FCC, and ARIB Frequency Bands
Single 3.3V Power Supply
70mA Typical Supply Current (Half-Duplex Mode)
Extended Operating Temperature Range
MAX2990/MAX2991評估板應用:
Automatic Meter Reading
Building Automation
Heating Ventilation and Air Conditioning (HVAC)
Home Automation
Industrial Automation
Lighting Control
Remote Monitoring and Control
Security Systems/Keyless Entry
Sensor Control and Data Acquisition
Voice-Over-Powerline
圖4.智能電表" title="智能電表">智能電表解決方案框圖
圖4.71M6543F/71M6543H工商業用多相電表SoC方案框圖
圖5.71M6543F/71M6543H低成本提高精度和設計靈活性電表SoC方案框圖
圖6.電網監測系統解決方案框圖
圖7.wye配置三相功率監測應用案例框圖
圖8.Maxim提供的有線/無線和串行通信方案框圖
圖9.智能電網通信架構圖
圖10.78M6618功率和電能測量應用框圖
詳情請見:
http://datasheets.maxim-ic.com/en/ds/MAX2991.pdf
和
http://www.maxim-ic.com/solutions/guide/smart-grid/smart-grid-solutions-guide-book.pdf
